<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.currentCity}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div
            class="button-wrapper"
            v-for="item in hot"
            :key="item.id"
            @click="handleCityClick(item.name)"
          >
            <div class="button">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div class="area" v-for="(item,key) in cities" :key="key" :ref="key">
        <div class="title border-topbottom">{{key}}</div>
        <div
          class="item-list"
          v-for="city in item"
          :key="city.id"
          @click="handleCityClick(city.name)"
        >
          <div class="item border-bottom">{{city.name}}</div>
        </div>
      </div>
    </div>
  </div>
</template>
<script>
import BScroll from 'better-scroll'
import {mapState, mapMutations} from 'vuex'
export default {
  name: 'cityList',
  props: {
    cities: Object,
    hot: Array,
    letter: String
  },
  mounted () {
    this.scroll = new BScroll(this.$refs.wrapper, {
      click: true
    })
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  watch: {
    letter () {
      if (this.letter) {
        let element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  }
}
</script>
<style lang="stylus" scoped>
.list
  position absolute
  top 1.66rem
  left 0
  right 0
  bottom 0
  overflow hidden
  .border-topbottom
    &:before
      border-color #ccc
    &:after
      border-color #ccc
  .border-bottom
    &:before
      border-color #ccc
  .title
    background #eeeeee
    color #666
    padding-left .2rem
    line-height .54rem
    font-size .26rem
  .button-list
    padding .1rem .6rem .1rem .1rem
    overflow hidden
    .button-wrapper
      float left
      width 33.3%
      .button
        border .02rem solid #ccc
        text-align center
        padding .06rem 0
        border-radius .1rem
        color #666
        margin .1rem
  .item-list
    .item
      line-height .76rem
      padding-left .2rem
</style>
